JP2022011076A - Color filter and display device - Google Patents

Abstract

To provide a color filter in which, of a simple structure though, front luminance and color reproducibility are improved.SOLUTION: The color filter comprises: a first subpixel having a first transmission wavelength band; a first lens arranged facing the first subpixel; a second subpixel included in a plurality of subpixels constituting a unit pixel P or other unit pixels, having a second transmission wavelength band that is different from the first transmission wavelength band, and adjacent to the first subpixel; a second lens arranged facing the second subpixel and arranged adjacent to the first lens in the same direction as the direction in which the second subpixel is adjacent to the first subpixel; and a planarization layer arranged between the first and second subpixels and the first and second lenses. The thickness t1 and width in adjacent direction of the first and second subpixels, the thickness t2 of the planarization layer, the width of the first and second lenses in the adjacent direction, and the distance between the lenses have a specific relation.SELECTED DRAWING: Figure 2

Description

The present invention relates to a color filter and a display device.

For example, in a display device such as an organic electroluminescence (EL) display device, a plurality of organic EL elements that generate white light are arranged in one pixel region for color display, and coloring is performed above each organic EL element. It is known that the filter and the lens are arranged respectively.
For example, in Patent Document 1, three organic EL elements that generate white light are arranged in one pixel region, and each color of red (R), green (G), and blue (B) is arranged on each of them. Disclosed is an organic EL display device provided with a coloring filter that transmits light and a lens arranged on each coloring filter.
For example, in Patent Document 2, a light emitting element including a concave organic layer that generates white light is arranged in one pixel region, and light of each color of R, G, and B is placed on each of the light emitting elements. A display device provided with a transmissive coloring filter and a lens arranged on each coloring filter is disclosed.

Japanese Unexamined Patent Publication No. 2014-2880 Japanese Unexamined Patent Publication No. 2019-133816

However, the above-mentioned conventional techniques have the following problems.
The lenses in Patent Documents 1 and 2 are provided to improve the front luminance of the light from the light emitting element.
In Patent Document 1, a microlens is formed on a color filter composed of sub-pixels that form display light of red, green, and blue wavelength components provided in a unit pixel having a size of 12 μm × 12 μm. There is. A large gap is provided between the sub-pixels as a countermeasure against color mixing. Therefore, the aperture ratio of the color filter is lowered, and the resolution cannot be improved so much.
In Patent Document 2, light emitted from a concave organic layer is collected by an internal lens, transmitted through a coloring filter, and emitted to the outside through an on-chip microlens arranged on the outermost side. Further, since a black matrix is formed between the coloring filters, the light from the light emitting element is prevented from being emitted from the adjacent coloring filters in combination with these.
In this case, the front luminance can be improved and the color mixing can be suppressed, but the manufacturing process for forming the organic layer in a concave shape or forming the black matrix increases, so that the manufacturing cost increases.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a color filter and a display device having good front luminance and color reproducibility even with a simple configuration. ..

ここで、ｔ１は前記第１副画素および前記第２副画素の厚さ、ｔ２は前記平坦化層の厚さ、ｗは前記隣接方向における前記第１副画素および前記第２副画素の幅、Ｌは前記隣接方向における前記第１レンズおよび前記第２レンズの幅、およびｄは前記隣接方向における前記第１レンズおよび前記第２レンズの間の距離である。 In order to solve the above problems, the color filter of the first aspect of the present invention includes a first sub-pixel which is included in a plurality of sub-pixels constituting a unit pixel in a color display and has a first transmission wavelength range. A plurality of sub-pixels constituting the first lens arranged to face the first sub-pixel in the thickness direction of the first sub-pixel, and the unit pixel or another unit pixel adjacent to the unit pixel. The second sub-pixel, which has the same thickness as the first sub-pixel and has a second transmission wavelength range different from the first transmission wavelength region, and is adjacent to the first sub-pixel, and the second sub-pixel. A second lens arranged so as to face the second sub-pixel in the thickness direction of the pixel and adjacent to the first lens in the same direction as the adjoining direction of the second sub-pixel to the first sub-pixel. The first sub-pixel and the second sub-pixel, and a flattening layer arranged between the first lens and the second lens are provided, and the following formulas (1) to (5) are used. I am satisfied.

Here, t1 is the thickness of the first sub-pixel and the second sub-pixel, t2 is the thickness of the flattening layer, and w is the width of the first sub-pixel and the second sub-pixel in the adjacent direction. L is the width of the first lens and the second lens in the adjacent direction, and d is the distance between the first lens and the second lens in the adjacent direction.

In the color filter, the unit pixel and the other unit pixels have different transmission wavelength ranges of red, green, and blue, respectively, and include three sub-pixels arranged in the same adjacent direction. The three sub-pixels have the same length in the direction orthogonal to the adjacent direction, and among the three sub-pixels, at least one set of sub-pixels adjacent to each other has the above equations (1) to (5). May be satisfied.

In the color filter, the unit pixel and the other unit pixels are a first color subpixel having a transmission wavelength range of one of red, green, and blue, and the red, green, and blue. A second color subpixel having a transmission wavelength range of a second color different from the first color of the blue color, and a third color of the red color, the green color, and the blue color different from the first color and the second color. A third color subpixel having a color transmission wavelength range and elongated in one direction is included, and the first color subpixel and the second color subpixel are in the longitudinal direction of the third color subpixel. The first color subpixel and the second color subpixel are adjacent to each other and are adjacent to the third color subpixel in the lateral direction intersecting the longitudinal direction of the third color subpixel, respectively. In addition, in at least one set of sub-pixels adjacent to each other among the first-color sub-pixel, the second-color sub-pixel, and the third-color sub-pixel, the formulas (1) to (1) to ( 5) may be satisfied.

The display device of the second aspect of the present invention includes the color filter and a plurality of light emitting elements each facing the plurality of sub-pixels constituting the unit pixel.

In the display device, the light emitting element may be an organic EL element.

According to the color filter and display device of the present invention, front luminance and color reproducibility are improved even with a simple configuration.

It is a schematic plan view which shows an example of the display device which concerns on 1st Embodiment of this invention. It is sectional drawing which follows the F2-F2 line in FIG. It is a schematic ray diagram which shows the operation of the color filter which concerns on 1st Embodiment of this invention. It is a schematic ray diagram which shows the operation of the color filter of the 1st comparative example. It is a schematic ray diagram which shows the operation of the color filter of the 2nd comparative example. It is a schematic ray diagram which shows the operation of the color filter of the 3rd comparative example. It is a schematic plan view which shows an example of the display device which concerns on 2nd Embodiment of this invention. FIG. 7 is a cross-sectional view taken along the line F8-F8 in FIG. FIG. 7 is a cross-sectional view taken along the line F9-F9 in FIG. FIG. 7 is a cross-sectional view taken along the line F10-F10 in FIG.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In all the drawings, even if the embodiments are different, the same or corresponding members are designated by the same reference numerals, and common description will be omitted.

[First Embodiment]
The color filter and the display device according to the first embodiment of the present invention will be described.
FIG. 1 is a schematic plan view showing an example of a display device according to the first embodiment of the present invention. FIG. 2 is a cross-sectional view taken along the line F2-F2 in FIG.

The organic EL display device 100 (display device) shown in FIG. 1 displays a color image based on an image signal. The application of the organic EL display device 100 is not particularly limited. For example, the organic EL display device 100 can be used as a display device for electronic devices such as smart glasses, head-mounted displays, and electronic viewfinders.
FIG. 1 shows the configuration of a unit pixel P in a plan view of the organic EL display device 100 of the present embodiment. Here, the plan view means viewing from the display screen of the organic EL display device 100 toward the light emitting element. The plan view is also viewed from the thickness direction of the filter unit 3 described later.

The unit pixel P is the smallest area for color display. For example, in the organic EL display device 100, a large number of unit pixels P shown in FIG. 1 are arranged adjacent to each other in the x direction from left to right in the figure and in the y direction from bottom to top in the figure. There is. The z-direction is a direction orthogonal to the x-direction and the y-direction, which is a direction from the back to the front of the illustrated paper. The z direction is the direction opposite to the direction in the plan view.
The outer shape of the display screen formed by the entire unit pixel P of the organic EL display device 100 is a rectangle having sides in the x-direction and the y-direction. The width of the unit pixel P in the x direction is Wx, and the width in the y direction is Wy. Wx and Wy may be equal to each other or different from each other.
For example, in the example shown in FIG. 1, Wx is 1/5 times Wy.
Hereinafter, for the sake of simplicity, the width in the x direction of a region, a member, etc. may be referred to as an x width, and the width in the y direction may be referred to as a y width.
The unit pixel P has a first sub-pixel area P1, a second sub-pixel area P2, and a third sub-pixel area P3. The first sub-pixel area P1, the second sub-pixel area P2, and the third sub-pixel area P3 are arranged in this order in the x direction. The first sub-pixel area P1, the second sub-pixel area P2, and the third sub-pixel area P3 divide the unit pixel P into three equal parts in the x direction.
Since the configuration of each unit pixel P in the organic EL display device 100 is the same, an example of a single unit pixel P will be described below.

The first sub-pixel area P1 is a rectangle having an x width of Wx / 3 and a y width of Wy in a plan view. The first sub-pixel area P1 displays, for example, red.
The second sub-pixel area P2 is a rectangle having an x width of Wx / 3 and a y width of Wy in a plan view. The second sub-pixel area P2 displays, for example, green.
The third sub-pixel area P3 is a rectangle having an x width of Wx / 3 and a y width of Wy in a plan view. The third sub-pixel area P3 displays, for example, blue.

As shown in FIG. 2, the organic EL display device 100 includes a main body portion 9 and a color filter 10.

The main body 9 has a substrate 6, a light emitting element 5, and a flattening film 4.
The plan view shape of the substrate 6 is larger than the display screen of the organic EL display device 100. The substrate 6 is formed of, for example, a silicon substrate.

The light emitting element 5 emits white light. For example, as the light emitting element 5, an organic EL element may be used. The organic EL element applies a DC voltage between the anode and the cathode, injects electrons and holes into the light emitting layer, and recombines them to generate excitons, and the light when these excitons are deactivated. It emits light by utilizing the emission of.
The light emitting element 5 is provided in the first sub-pixel area P1, the second sub-pixel area P2, and the third sub-pixel area P3, respectively.
As shown in FIG. 1, the plan-view shape of each light emitting element 5 is slightly smaller than the outer shape of the first sub-pixel area P1, the second sub-pixel area P2, and the third sub-pixel area P3 in which each is arranged. It has a rectangular shape.
In the example shown in FIG. 1, the x width of each light emitting element 5 is slightly narrower than Wx / 3, and the y width is slightly narrower than Wy.
The light emitting device 5 is manufactured on a silicon substrate using, for example, a semiconductor manufacturing process.

The electrodes in each light emitting element 5 are connected to a drive circuit (not shown) through wiring formed on the substrate 6. The drive circuit controls lighting and extinguishing of each light emitting element 5 based on the image signal.

As shown in FIG. 2, the flattening film 4 covers at least the substrate 6 and the light emitting element 5 in each unit pixel P, and forms a flat surface 4a on the surface in the z direction. The flat surface 4a is a plane extending over the entire display area of the organic EL display device 100.
The flattening film 4 protects the light emitting element 5 by covering the light emitting element 5. For example, the flattening film 4 suppresses deterioration of the light emitting element 5 by preventing moisture, oxygen, and the like from coming into contact with the light emitting element 5.
The material of the flattening film 4 is a transparent resin material having a good transmittance for visible light. As the material of the flattening film 4, it is more preferable to use a material having a high barrier property against at least one of moisture and oxygen.
The film thickness on the light emitting element 5 in the flattening film 4 is, for example, 0.1 μm.

The color filter 10 has a filter unit 3, a flattening layer 2, and a lens 1 in this order in the z direction.

The filter portion 3 is a layered portion having a thickness t1 having an upper surface 3a and a lower surface 3b. The conditions under which t1 is satisfied will be described later.
The filter portion 3 covers the flattening film 4 with the lower surface 3b in close contact with the flat surface 4a.
The filter unit 3 regulates the transmission wavelength of the light incident from each light emitting element 5 via the flattening film 4.

The filter unit 3 includes a first colored layer 31 (sub pixel), a second colored layer 32 (sub pixel), and a third colored layer 33 (sub pixel).
The first colored layer 31 is overlapped with the first sub-pixel area P1. The first colored layer 31 forms, for example, sub-pixels having a red transmission wavelength range.
The second colored layer 32 is arranged adjacent to each other in the x direction of the first colored layer 31. The second colored layer 32 is overlapped with the second sub-pixel area P2. The second colored layer 32 forms, for example, sub-pixels having a green transmission wavelength range.
The third colored layer 33 is arranged adjacent to each other in the x direction of the second colored layer 32. The third colored layer 33 is superimposed on the third sub-pixel area P3. The third colored layer 33 forms, for example, sub-pixels having a blue transmission wavelength range.

In the present embodiment, each of the first colored layer 31, the second colored layer 32, and the third colored layer 33 viewed from the thickness direction is a rectangular shape elongated in the y direction, and each is a first sub-pixel area. It has the same shape as P1, the second sub-pixel area P2, and the third sub-pixel area P3. Therefore, the first colored layer 31, the second colored layer 32, and the third colored layer 33 forming the three sub-pixels are formed in a shape that divides the unit pixel P into three equal parts in the x direction.
Each x width of the first colored layer 31, the second colored layer 32, and the third colored layer 33 is wx (= Wx / 3), and each y width is Wy.

The filter unit 3 is formed by solidifying a resin composition in which a color material corresponding to each transmission wavelength range is dispersed in a transparent resin.

The flattening layer 2 is a layered portion having a thickness t2 laminated on the upper surface 3a of the filter portion 3. The conditions under which t2 is satisfied will be described later.
The upper surface 2a of the flattening layer 2 is a plane parallel to the lower surface 3b of the filter portion 3.
The material of the flattening layer 2 is a transparent resin material having a good transmittance for visible light.

The lens 1 is arranged so as to face the thickness direction (z direction) of each of the first colored layer 31, the second colored layer 32, and the third colored layer 33 with the flattening layer 2 interposed therebetween. The light transmitted through the layer 31, the second colored layer 32, and the third colored layer 33 is condensed. The collected light is emitted to the outside of the color filter 10 around the optical axis of each lens 1 extending in the z direction.

As shown in FIG. 1, in the present embodiment, the lens 1 has two lenses 1 in each longitudinal direction (y direction) of the first sub-pixel area P1, the second sub-pixel area P2, and the third sub-pixel area P3. They are arranged side by side. However, the number of lenses 1 in the longitudinal direction of the first sub-pixel area P1, the second sub-pixel area P2, and the third sub-pixel area P3 may be appropriately changed according to the length in the longitudinal direction.
The y width of each lens 1 is Ly. The distance between the lenses 1 adjacent to each other in the y direction is dy. The smaller dy is more preferable from the viewpoint of improving the light extraction efficiency. For example, dy may be 0.
In the example shown in FIG. 1, the y-width Ly of each lens is (Wy / 2-dy).

The x width of each lens 1 is Lx. The distance between the lenses 1 adjacent to each other in the x direction is dx. The conditions under which Lx and dx are satisfied will be described later.
For example, the plan view shape of each lens 1 has a shape in which the four corners of a rectangle having an x width of Lx and a y width of Ly are rounded in an arc shape. In particular, when Lx = Ly, the plan view shape of each lens 1 may be a circle.

In the present embodiment, in a plan view, there is a gap at least in the x direction and in the diagonal direction of each lens 1, and the upper surface 2a of the flattening layer 2 is exposed.

The material of the lens 1 is a transparent resin material having a good transmittance with respect to visible light. The material of the lens 1 may be the same material as that of the flattening layer 2, or may be a different material. When the material of the lens 1 is different from the material of the flattening layer 2, the refractive indexes may be different from each other.
In the example shown in FIG. 2, each lens 1 has a plane 1b and a convex lens surface 1a in this order in the z direction. Here, the plane 1b is an interface with the flattening layer 2. However, when the lens 1 and the flattening layer 2 are made of the same material, an interface is not formed between the lens 1 and the flattening layer 2, so that the plane 1b is a virtual surface. When the refractive index of the lens 1 and the flattening layer 2 is the same, even if the plane 1b is formed, the plane 1b does not function as a refracting surface and a reflecting surface.
Hereinafter, unless otherwise specified, the case where the lens 1 and the flattening layer 2 are made of the same material and the refractive indexes of the lens 1 and the flattening layer 2 are equal to each other will be described.

Each lens 1 is a convex lens in which the convex lens surface 1a has a positive refractive power.
As the shape of each convex lens surface 1a, an appropriate shape is used in consideration of the light collection performance and the light extraction efficiency of the lens 1. For example, each convex lens surface 1a may be a hemispherical shape convex in the z direction. Here, the hemisphere includes a case of a hemisphere, a case of a spherical surface having a ball chipping height smaller than a radius, and a case of these hemispherical surfaces and an aspherical surface close to the spherical surface.
By having such a shape, each lens 1 can collect the synchrotron radiation emitted by the light emitting element 5. The optical axis O of each lens 1 passes through the center of each lens 1 and extends in the z direction.
As shown in FIG. 2, each optical axis O is located at the center of the width (short width) of each light emitting element 5 in the x direction.

In the color filter 10 of the present embodiment, a specific sub-pixel having a first transmission wavelength region is adjacent to the first sub-pixel and the first sub-pixel and has a second transmission wavelength region different from the first transmission wavelength region. When the sub-pixel is referred to as a second sub-pixel and the lens 1 facing the first sub-pixel and the second sub-pixel is referred to as a first lens and a second lens, the following equations (1) to (5) are used for each shape. ) Satisfying the shape.

Here, t1 is the thickness of the first sub-pixel and the second sub-pixel, t2 is the thickness of the flattening layer 2, w is the width of the first sub-pixel and the second sub-pixel in the adjacent direction, and L is the width in the adjacent direction. The widths of the first lens and the second lens, and d are the distances between the first lens and the second lens in the adjacent direction.

As shown in the formula (1), T represents the total thickness of the filter unit 3 and the flattening layer 2. In the filter unit 3 and the flattening layer 2, the light emitted from the light emitting element 5 is refracted according to the difference in the refractive index between the filter unit 3 and the second lens 2, but when the difference in the refractive index is small, the light travels substantially straight. ..
The condition of the formula (2) is that the total thickness T of the filter unit 3 and the flattening layer 2 is less than each width w of the first sub-pixel and the second sub-pixel. When T is w or more, the focusing range of the synchrotron radiation from the light emitting element 5 by the first lens and the second lens is narrowed, so that the front luminance is lowered.
On the other hand, if it is easy to collect light having a large radiation angle, the light emitted from the end of the first sub-pixel and the leaked light transmitted through the adjacent second sub-pixel are emitted from the second lens toward the front. Increases the ratio. In this case, the leaked light has a color different from that of the first transmission wavelength range of the first sub-pixel by transmitting through the second sub-pixel. When leaked light having a color different from that of the first transmitted wavelength range is observed, the color reproducibility may be deteriorated depending on the amount of the leaked light.
In the present embodiment, in order to prevent the leaked light from being emitted toward the front surface, a gap is formed between the lenses by providing a distance between the first lens and the second lens in the adjacent direction. There is.
Equation (3) defines an appropriate gap size d. Equation (5) represents the width L of the first lens and the second lens when the distance between the lenses is d.
Equation (4) defines the range of the width L of the first lens and the second lens, which makes it easy to optimize the front luminance.
If the width of the first lens and the second lens is w, the distance between the lenses becomes 0, and a gap cannot be formed in the adjacent direction.
If the widths of the first lens and the second lens are less than 0.8 × w, the leakage light is less likely to be directed toward the front, but the numerical apertures of the first lens and the second lens are too small. Therefore, the light extraction efficiency of the display light having an appropriate transmission wavelength range and the front luminance are lowered.

In the present embodiment, the first colored layer 31 and the second colored layer 32 and the second colored layer 32 and the third colored layer 33, which are adjacent to each other in the x direction in the unit pixel P, are the first sub-pixels, respectively. And the second sub-pixel.
Since the first colored layer 31 of the unit pixel P is adjacent to the third colored layer 33 of another unit pixel P adjacent in the direction opposite to the x direction, the first colored layer 31 and other adjacent colored layers 31 are adjacent to the first colored layer 31. The third colored layer 33 of the unit pixel P constitutes the first sub-pixel and the second sub-pixel.
Since the third colored layer 33 of the unit pixel P is adjacent to the first colored layer 31 of another unit pixel P adjacent in the x direction, the third colored layer 33 and the first colored layer 31 are the first. It constitutes a sub-pixel and a second sub-pixel.
In the present embodiment, the relationships of w = wx, d = dx, and L = Lx in the equations (1) to (5) are satisfied for any of the above-mentioned first sub-pixels and second sub-pixels. ing.

On the other hand, in the present embodiment, in the y direction and in the direction opposite to the y direction, sub-pixels having different transmission wavelength regions are adjacent to each other in the unit pixel P and between the unit pixel P and another adjacent unit pixel P. Not done. Therefore, in the y-direction and the direction opposite to the y-direction, there are no sub-pixels corresponding to the first sub-pixel and the second sub-pixel that satisfy the equations (1) to (5). For example, in the y direction and the direction opposite to the y direction, the closer dy is to 0, the more preferable.

The organic EL display device 100 uses a semiconductor manufacturing process to form a light emitting element 5 on a substrate 6, laminates a flattening film 4 on the substrate 6 and the light emitting element 5 to form a main body portion 9, and forms a main body 9 on a flat surface 4a. It can be manufactured by forming the filter unit 3, the flattening layer 2, and the lens 1.
For example, the filter unit 3 prepares a resin composition in which the coloring materials forming the first colored layer 31, the second colored layer 32, and the third colored layer 33 are dispersed in a photosensitive resin, respectively, via a pattern mask. It can be formed by forming a cured layer of each resin composition on a flat surface 4a by a photolithography method of exposure and development.
For example, in the lens 1, after forming the flattening layer 2 and the resin layer forming the lens 1 on the filter portion 3, the convex lens surface 1a of each lens 1 and the flat surface portion F are formed on the surface of the resin layer by an etch back method. It can be formed by forming the shape of. The flattening layer 2 is formed by the non-etched layered portion of the resin layer.

The operation of the organic EL display device 100 will be described focusing on the operation of the color filter 10.
FIG. 3 is a schematic ray diagram showing the operation of the color filter according to the first embodiment of the present invention.

In the organic EL display device 100, the light emitting element 5 facing the first colored layer 31 is controlled to emit light based on an image signal (hereinafter, R signal) of a red component. Similarly, the light emitting element 5 facing the second colored layer 32 has a green component image signal (hereinafter, G signal), and the light emitting element 5 facing the third colored layer 33 has a blue component image signal (hereinafter, B signal). ), The light emission is controlled respectively.
In the unit pixel P, the light from the light emitting element 5 driven by the R signal passes through the first colored layer 31 and is emitted to the outside, and the light from the light emitting element 5 driven by the G signal is transmitted to the second colored layer 31. The light from the light emitting element 5 driven by the B signal is transmitted to the outside through the third colored layer 33 and is emitted to the outside through the 32 to display the color faithful to the image signal.

As shown in FIG. 3, consider light rays incident on points A, B, and C on the lower surface 3b of the first colored layer 31. Points A, B, and C face each other in the z direction with the end portion of the light emitting element 5 facing the first colored layer 31 on the opposite side of the x direction, the central portion in the x direction, and the end portion in the x direction. It is a point to do.
For example, the light ray R1 heading from the point B in the z direction passes through the first colored layer 31, the flattening layer 2, and the convex lens surface 1a1 facing the first colored layer 31 in this order, and is emitted in the z direction.
For example, from the point B, a light ray R2 in an oblique direction toward the x direction is incident as it travels in the z direction. The angle of the light ray R2 with respect to the z direction may be considered up to, for example, about 45 ° in order to obtain an appropriate light extraction efficiency.
In this case, in this embodiment, since the color filter 10 satisfies the formulas (1) to (5), the light ray R2 faces the first colored layer 31, the flattening layer 2, and the second colored layer 32. The convex lens surface 1a2 is transmitted in this order and emitted in the z direction. The emission direction of the light ray R2 advances in a direction inclined with respect to the z direction depending on the light collecting performance of the convex lens surface 1a2. However, since the light ray R2 is refracted on the convex lens surface 1a2, even if it deviates from the z direction, it does not deviate too much from the z direction. In FIG. 3, the ray R2 is schematically drawn so as to travel in the z direction. The same applies to other light rays emitted from the convex lens surface 1a.
In the following, the case where the light ray travels in the z direction includes the case where it travels strictly in the z direction and the case where it travels in the substantially z direction unless otherwise specified.

Like the light rays R1 and R2, the convex lens surface 1a1 is incident on the first colored layer 31 from the point B, passes through the first colored layer 31, and then passes through the flattening layer 2 and faces the first colored layer 31. The light rays emitted from both the convex lens surfaces 1a2 adjacent to each other in the x-direction are red light.
The light ray R3 traveling parallel to the light ray R2 from the point A passes through the first colored layer 31 and then exits from the convex lens surface 1a2 in the z direction via the flattening layer 2 without passing through the second colored layer 32. do. Therefore, the light ray R3 is red light.
Therefore, the rays R1 and R2 form red light corresponding to the R signal.
According to the present embodiment, even light emitted obliquely from the light emitting element 5, such as light rays R2 and R3, is emitted in the z direction through the convex lens surface 1a2 adjacent to the x direction. Therefore, the front luminance of the red light can be improved as compared with the case where the rays R2 and R3 travel substantially straight in the diagonal direction.

The light ray R4 traveling parallel to the light ray R2 from the point C passes through the first colored layer 31, then passes through the second colored layer 32, passes through the flattening layer 2, and is emitted from the upper surface 2a.
The color of the light ray R4 is close to green because the length passing through the second colored layer 32 is longer than the length passing through the first colored layer 31. Since the light ray R4 is light that emits light based on the R signal and is close to green, when observed mixed with the display light, an error in the green component in the unit pixel P occurs.
In the present embodiment, the light ray R4 is emitted from the upper surface 2a having no refractive power. Although the light ray R4 is refracted at the upper surface 2a according to Snell's law, it is equivalent to traveling substantially straight as compared with the case where it passes through the convex lens surface 1a. Therefore, the light ray R4 travels in a direction inclined by approximately 45 ° with respect to the z direction.
Since the light ray R4 travels in a direction inclined by approximately 45 ° in the x direction with respect to the front surface, it does not mix with the display light of the unit pixel P when observing with the front surface as the center. Color mixing is suppressed and color reproducibility is improved.

Such an operation of the present embodiment will be described in comparison with a comparative example.
FIG. 4 is a schematic ray diagram showing the operation of the color filter of the first comparative example. FIG. 5 is a schematic ray diagram showing the operation of the color filter of the second comparative example. FIG. 6 is a schematic ray diagram showing the operation of the color filter of the third comparative example.

As shown in FIG. 4, the organic EL display device 200A of the first comparative example is the same as the organic EL display device 100 except that the flattening layer 2A is provided in place of the flattening layer 2 of the organic EL display device 100. It is composed.
The flattening layer 2A is the same as the flattening layer 2 except that the thickness t2A is thinner than t2.
Therefore, in this comparative example, TA = t1 + t2A is smaller than T in this embodiment. This comparative example is an example in which the relationship of the formula (3) is not satisfied due to the thinness of the flattening layer 2A.
In this comparative example, the heights of the convex lens surfaces 1a and the upper surface 2a measured from the upper surface 3a are lowered, but the light ray R1 is emitted in the same manner as in the present embodiment. The light rays R2 and R3 have different emission positions on the convex lens surface 1a from those of the embodiment, but the emission directions are the same as those of the present embodiment.
On the other hand, the light ray R4 in this comparative example is emitted through the convex lens surface 1a2 as a result of the convex lens surface 1a2 being low, and thus is emitted in the z direction as in the light ray R2.
Therefore, when observing from the front, the greenish light ray R4 is mixed with the display light, so that color mixing occurs. Therefore, the color reproducibility is lowered.

As shown in FIG. 5, the organic EL display device 200B of the second comparative example is configured in the same manner as the organic EL display device 100 except that the lens 1B is provided in place of the lens 1 of the organic EL display device 100.
The lens 1B includes a convex lens surface 1aB instead of the convex lens surface 1a of the lens 1. The lens 1B is the same as the lens 1 except that the width in the x direction is LxB equal to wx.
Therefore, in this comparative example, when w is larger than T, L is equal to w, so that the distance between the lenses 1B is 0. This comparative example is an example in which the relationship between the equations (3) and (4) is not satisfied because the width of the lens 1B in the adjacent direction is too large.
In this comparative example, of the convex lens surfaces 1aB, the convex lens surfaces 1a1B and 1a2B adjacent to each other are in contact with each other at least in the cross section in the adjacent direction (cross section orthogonal to the y direction). Therefore, the upper surface 2a is not exposed between the lenses 1B.
In this comparative example, in addition to the light rays R1, R2, and R3 being emitted in the z direction, the light rays R4 are emitted from the convex lens surface 1a2B in the z direction, similarly to the light rays R2.
Therefore, when observing from the front, the greenish light ray R4 is mixed with the display light, so that color mixing occurs. Therefore, the color reproducibility is lowered.

As shown in FIG. 6, the organic EL display device 200C of the third comparative example includes an organic EL, except that the flattening layer 2A and the lens 1B are provided in place of the flattening layer 2 and the lens 1 of the organic EL display device 100. It is configured in the same manner as the display device 100. This comparative example is a combination of the first comparative example and the second comparative example.
Therefore, this comparative example is an example in which the relationships of the equations (3) and (4) are not satisfied, as in the first comparative example and the second comparative example.
In this comparative example, in addition to the light rays R1, R2, and R3 being emitted in the z direction as in the second comparative example, the light rays R4 are emitted from the convex lens surface 1a2B in the z direction as in the light rays R2.
Therefore, when observing from the front, the greenish light ray R4 is mixed with the display light, so that color mixing occurs. Therefore, the color reproducibility is lowered.

In the above description, the example of a light ray that travels in the x direction as it travels in the z direction as a light ray in the diagonal direction has been described. You can read it in the opposite direction.
In the above description, the case where the first sub-pixel and the second sub-pixel are the first colored layer 31 and the second colored layer 32 has been described, but when the other combinations are the first sub-pixel and the second sub-pixel. Is the same.

As described above, according to the organic EL display device 100 of the present embodiment, the equation (1) is related to the first sub-pixel and the second sub-pixel adjacent to each other in the x-direction, and the first lens and the second lens. )-(5) is provided, so that the front brightness and the color reproducibility are improved.
In order to suppress color mixing, it is conceivable to provide a light-shielding wall between adjacent sub-pixels or adjacent lenses. However, in order to provide such a light-shielding wall with high accuracy, the manufacturing cost may increase. Further, the light that reaches the light-shielding wall is absorbed even if the light does not cause color mixing, so that the light extraction efficiency and the front luminance may decrease.
On the other hand, in the present embodiment, since the light-shielding wall is not provided, the configuration of the color filter 10 is simplified. As a result, the manufacturing cost can be suppressed and the front luminance can be easily improved.

[Second Embodiment]
The color filter and the display device according to the second embodiment of the present invention will be described.
FIG. 7 is a schematic plan view showing an example of the display device according to the second embodiment of the present invention. FIG. 8 is a cross-sectional view taken along the line F8-F8 in FIG. FIG. 9 is a cross-sectional view taken along the line F9-F9 in FIG. FIG. 10 is a cross-sectional view taken along the line F10-F10 in FIG.

The organic EL display device 101 (display device) of the present embodiment shown in FIG. 7 includes unit pixels P10 having a rectangular shape in a plan view in place of each of the unit pixels P of the organic EL display device 100 of the first embodiment. .. The application of the organic EL display device 101 is not particularly limited. For example, the organic EL display device 101 can be used as a display device for electronic devices such as smart glasses, head-mounted displays, and electronic viewfinders, like the organic EL display device 100.
Hereinafter, the points different from the first embodiment will be mainly described.

The x width of the unit pixel P10 is 2 × wx, and the y width is Wy. In particular, when 2 × wx = Wy, the plan view shape of the unit pixel P10 is a square.
The unit pixel P10 has a first sub-pixel area P11, a second sub-pixel area P12, and a third sub-pixel area P13. The second sub-pixel area P12 and the first sub-pixel area P11 are arranged in this order in the y direction. The third sub-pixel area P13 is arranged adjacent to each other on the x-direction side of each of the first sub-pixel area P11 and the second sub-pixel area P12.

The first sub-pixel area P11 is a rectangle having an x width of wx and a y width of Wy / 2 in a plan view. The first sub-pixel area P11 displays, for example, red.
The second sub-pixel area P12 is a rectangle having an x width of wx and a y width of Wy / 2 in a plan view. The second sub-pixel area P12 displays, for example, green.
The third sub-pixel area P13 is an elongated rectangle having an x-width of wx and a y-width of Wy in a plan view. The third sub-pixel area P13 displays, for example, blue.

As shown in FIG. 8, the organic EL display device 101 has a main body portion 19 and a color filter 11.

The main body 19 has a light emitting element 15 instead of the light emitting element 5 of the main body 9 in the first embodiment.
The light emitting element 15 is the same as the light emitting element 5 in the first embodiment except that the shape in a plan view is different. The light emitting element 15 includes a light emitting element 15A provided in the first sub pixel area P11 and the second sub pixel area P12, and a light emitting element 15B provided in the third sub pixel area P13. For example, as the light emitting element 15, an organic EL element may be used.
As shown in FIG. 7, the plan view shape of each light emitting element 15A is a rectangular shape slightly smaller than the outer shape of the first sub-pixel area P11 and the second sub-pixel area P12 in which each is arranged.
The plan view shape of the light emitting element 15B is a rectangular shape slightly smaller than the outer shape of the third sub-pixel area P13 in which each is arranged.

The color filter 11 has a filter unit 13 instead of the filter unit 3 of the color filter 10 in the first embodiment.

The filter unit 13 has a first colored layer 41 (sub-pixel) and a second colored layer 42 (sub-pixel) in place of the first colored layer 31 and the second colored layer 32 of the filter unit 3.

The first colored layer 41 is superimposed on the first sub-pixel area P11. The first colored layer 41 has, for example, a red transmission wavelength region.
As shown in FIG. 9, the second colored layer 42 is arranged adjacent to the first colored layer 41 along the y direction. The second colored layer 42 is superimposed on the second sub-pixel area P12. The second colored layer 42 has, for example, a green transmission wavelength range.
The plan-view shape of the first colored layer 41 and the second colored layer 42 is a rectangle having an x width of wx and a y width of wy (= Wy / 2).

As shown in FIGS. 8 and 9, the third colored layer 33 in the present embodiment is the same as that in the first embodiment except that the third colored layer 33 is overlapped with the third sub-pixel area P13. The plan-view shape of the third colored layer 33 is a rectangular shape having an x width of wx and a y width of 2 × wy, which is elongated in the y direction.

The filter unit 13 is formed in the same manner as the filter unit 3 except that the shape and arrangement of the sub-pixels in a plan view are different.

The lens 1 in the present embodiment is the same as the lens 1 in the first embodiment except that four lenses 1 are arranged in the unit pixel P10.
Therefore, two lenses 1 in the present embodiment are arranged in the first sub-pixel area P11 and the second sub-pixel area P12, respectively, and in the third sub-pixel area P13.
Each lens 1 is arranged so as to face the first colored layer 41, the second colored layer 42, and the third colored layer 33 with the flattening layer 2 interposed therebetween. In particular, the two lenses 1 facing the third colored layer 33 are arranged side by side in the y direction, which is the longitudinal direction of the third colored layer 33.
As shown in FIG. 8, a gap dx similar to that in the first embodiment is provided between the lenses 1 adjacent to each other in the x direction.
As shown in FIGS. 9 and 10, a similar gap dy is provided between the lenses 1 adjacent to each other in the y direction.

In the present embodiment, the first colored layer 41 and the third colored layer 33 and the second colored layer 42 and the third colored layer 33, which are adjacent to each other in the x direction in the unit pixel P10, are the first sub-pixels, respectively. And the second sub-pixel.
Since the first colored layer 41 of the unit pixel P10 is adjacent to the third colored layer 33 of another unit pixel P10 adjacent in the direction opposite to the x direction, the first colored layer 41 and other adjacent colored layers 41 are adjacent to the first colored layer 41. The third colored layer 33 of the unit pixel P10 constitutes the first sub-pixel and the second sub-pixel. Similarly, the second colored layer 42 and the third colored layer 33 of the other unit pixels P10 adjacent thereto form the first sub-pixel and the second sub-pixel.
Similarly, the third colored layer 33 of the unit pixel P10 and the first colored layer 41 or the second colored layer 42 in the other unit pixel P10 adjacent to the unit pixel P10 in the x direction are the first subpixel and the first. It constitutes two sub-pixels.
In the present embodiment, in the first sub-pixel and the second sub-pixel adjacent to each other in the x direction, the relationship of w = wx, d = dx, L = Lx in the above equations (1) to (5) is established. I am satisfied.

In the present embodiment, the first colored layer 41 and the second colored layer 42 adjacent to each other in the y direction in the unit pixel P10 constitute the first sub-pixel and the second sub-pixel.
Since the first colored layer 41 of the unit pixel P10 is adjacent to the second colored layer 42 of another unit pixel P10 adjacent in the y direction, the first colored layer 41 and another unit pixel P10 adjacent thereto are adjacent to the first colored layer 41. The second colored layer 42 and the second colored layer 42 constitute the first sub-pixel and the second sub-pixel. Similarly, the second colored layer 42 and the first colored layer 41 of the other unit pixels P10 adjacent thereto constitute the first sub-pixel and the second sub-pixel.
In the present embodiment, in the first sub-pixel and the second sub-pixel adjacent to each other in the y direction, the relationship of w = wy, d = dy, and L = Ly in the above equations (1) to (5) is established. I am satisfied.

The organic EL display device 101 of the present embodiment is configured in the same manner as the organic EL display device 100 except that the shapes and arrangements of the sub-pixels in the color filter 11 are different.
The organic EL display device 101 satisfies the equations (1) to (5) with respect to the first sub-pixel and the second sub-pixel adjacent to each other and the first lens and the second lens, respectively, in the x-direction and the y-direction. Since the color filter 11 is provided, the front brightness and the color reproducibility are improved as in the first embodiment.

In each of the above embodiments, the case where the light emitting element is an organic EL element has been described. However, the type of light emitting element is not limited to the organic EL element. For example, an example of a light emitting element includes an inorganic LED element and the like.

In each of the above embodiments, examples have been described in which red, green, and blue sub-pixels are arranged in the first sub-pixel area, the second sub-pixel area, and the third sub-pixel area, respectively. However, if the unit pixel can be displayed in color, the color of the sub-pixel and the arrangement position are not limited to this.

Examples 1 and 2 of the color filter and the display device of the first embodiment will be described together with Comparative Examples 1 and 2. The following [Table 1] shows the configurations of Examples 1 and 2 and Comparative Examples 1 and 2 and the evaluation results.

[Example 1]
The first embodiment is an embodiment corresponding to the first embodiment.
The size of the unit pixel P in the organic EL display device 100 of the first embodiment is Wx = Wy = 7.2 (μm), and the first sub-pixel area P1, the second sub-pixel area P2, and the third sub-pixel The x-width x y-width of the region P3 was 2.4 μm × 7.2 μm, respectively.
The x-width x y-width of the first colored layer 31, the second colored layer 32, and the third colored layer 33 (hereinafter, may be referred to as each sub-pixel) was 2.4 μm × 7.2 μm, respectively. ..
As shown in [Table 1], the width w in the direction adjacent to the widening was 2.4 μm. The thickness t1 of each sub-pixel was 1.0 μm. The thickness t2 of the flattening layer 2 was 1.2 μm.
Each lens 1 is provided with three facing each sub-pixel. The x-width x y-width of each lens 1 was 2.0 μm × 2.0 μm.
Each lens 1 was arranged so that the optical axis coincided with the center of each sub-pixel in the x direction, and was arranged with a gap of 0.4 μm in the x direction. Each lens 1 was arranged with a gap of 0.4 μm in the y direction.
Therefore, as shown in [Table 1], the width L of each lens 1 in the x direction, which is the adjacent direction, was 2.0 μm, and the distance d between the lenses 1 was 0.4 μm.
The color filter 10 of this embodiment satisfied all the equations (1) to (5) in the x direction.

In order to manufacture the organic EL display device 100 of Example 1, a TFT layer was formed on a silicon substrate by using a known method such as a sputtering method or an etching method. Further, a white organic EL element was formed on the TFT layer by a known method such as a vapor deposition method, and then silicon nitride was coated by the CVD method to form an organic EL element substrate.
Here, the silicon substrate and the white organic EL element correspond to the substrate 6 and the light emitting element 5, respectively.

In order to manufacture the filter unit 3, red, green, and blue photosensitive coloring compositions RR-1, GR-1, and BR-1 having the compositions shown in the following [Table 2] were prepared.

In [Table 1], the "resin" is a binder and the "monomer" is a curing agent. The initiator is an additive for radically polymerizing the curing agent. Chain transfer agents are additives for promoting radical polymerization.

The red coloring material R-1 used in the photosensitive coloring composition RR-1 was prepared as follows.
After uniformly stirring and mixing the mixture MR having the following composition, the mixture MR was dispersed for 5 hours in a sand mill using a glass bead having a diameter of 1 mm. Then, the mixture MR was filtered through a 5 μm filter to obtain a red coloring material R-1.
In the mixture MR, C.I. I. As Pigment Red 254, Irger for Red B-CF (trade name; manufactured by BASF) was used. C. I. As Pigment Yellow 139, Palodol (registered trademark) Yellow L 2146HD (trade name; manufactured by BASF) was used.

(Composition of mixture MR)
Red pigment: C.I. I. Pigment Red 254 78 parts by weight Yellow pigment: C.I. I. Pigment Yellow 139 22 parts by weight Acrylic varnish (20% solid content) 215 parts by weight

The green coloring material G-1 used in the photosensitive coloring composition GR-1 was prepared in the same manner as the coloring material R-1 except that the mixture MG having the following composition was used instead of the mixture MG.
In the mixture MG, C.I. I. As Pigment Green 58, FASTOGEN (registered trademark) GREEN A110 (trade name; manufactured by DIC Corporation) was used. C. I. As Pigment Yellow 185, Palotol (registered trademark) Yellow L 1155 (trade name; manufactured by BASF) was used.

(Composition of mixture MG)
Green pigment: C.I. I. Pigment Green 58 65 parts by weight Yellow pigment: C.I. I. Pigment Yellow 185 35 parts by weight Acrylic varnish (20% solid content) 215 parts by weight

The blue coloring material B-1 used in the photosensitive coloring composition BR-1 was prepared in the same manner as the coloring material R-1 except that the mixture MB having the following composition was used instead of the mixture MG.
In the mixture MB, C.I. I. As Pigment Blue 15: 6, LIONOL (registered trademark) BLUE ES (trade name; manufactured by Toyo Color Co., Ltd.) was used. C. I. As Pigment Violet 23, LIONOGEN (registered trademark) VIOLET RLUE ES (trade name; manufactured by Toyo Color Co., Ltd.) was used.

(Composition of mixture MB)
Blue pigment: C.I. I. Pigment Blue 15: 6 63 parts by weight Purple Pigment: C.I. I. Pigment Violet 23 37 parts by weight Acrylic varnish (20% solid content) 215 parts by weight

The lens 1 and the flattening layer 2 can be formed by using a transparent material obtained by removing the coloring material for coloring from the photosensitive coloring compositions RR-1, GR-1, and BR-1. For example, the refractive index can be adjusted by containing an inorganic component such as silica, titanium oxide, or a zirconium oxide dispersion as a refractive index adjusting material instead of the coloring material. By adjusting the type and content of the refractive index adjusting material, for example, a refractive index in the range of 1.5 to 1.65 can be obtained.
In this embodiment, as the material of the lens 1 and the flattening layer 2, a transparent material obtained by removing the coloring material for coloring from the photosensitive coloring compositions RR-1, GR-1, and BR-1 has a refractive index of 1. It was used by containing titanium oxide so as to be 6.

The organic EL display device 100 of this embodiment was manufactured as follows.
The transparent resin composition for forming the flattening film 4 on the above-mentioned organic EL element substrate was applied with a spinner so that the cured film thickness was 0.1 μm. Then, the transparent resin composition was cured by heating at 100 ° C. for 10 minutes using a heating oven to form a flattening film 4. As a result, the main body 9 was formed.
The green photosensitive resin composition GR-1 was applied onto the main body 9 with a spinner so that the cured film thickness was 1.2 μm. After that, ultraviolet exposure, alkaline development, washing with water, and drying were performed via a pattern mask to temporarily form a second colored layer 32, which is a green sub-pixel, in each second sub-pixel area P2. The x-width × y-width in each second colored layer 32 was 2.4 μm × 7.2 μm. Then, it was heated at 80 ° C. for 10 minutes using a heating oven to cure the temporarily formed second colored layer 32.

After that, the first colored layer 31 was formed in the same manner as the method for forming the second colored layer 32, except that the red photosensitive resin composition RR-1 was used to form the first sub-pixel region P1.
After that, the third colored layer 33 was formed in the same manner as the method for forming the second colored layer 32, except that the blue photosensitive resin composition BR-1 was used to form the third colored layer 33.
As described above, the filter portion 3 is formed on the main body portion 9 of the first embodiment.

After forming the filter portion 3, the material for forming the lens 1 and the flattening layer 2 was applied onto the filter portion 3 with a spinner so that the film thickness of the cured finish was 2.4 μm. After that, the entire coating film was exposed to ultraviolet rays and then heated at 80 ° C. for 10 minutes using a heating oven to cure the coating film and form a transparent resin layer.
After that, a convex lens 1 having a height of 1.2 μm and an x width and a y width of 2.0 μm was formed on the surface of the transparent resin layer by an etch back method. Three lenses 1 were formed above the first colored layer 31, the second colored layer 32, and the third colored layer 33, respectively.

After that, the surface of the lens 1 was bonded to the cover glass using a sealing agent, Stract Bond (registered trademark) XMF-T107 (trade name; manufactured by Mitsui Chemicals, Inc.). As a result, the organic EL display device 100 of Example 1 was manufactured.

[Example 2]
Example 2 was the same as that of Example 1 except that the thickness t1 of the sub-pixel was 1.2 μm and the thickness t2 of the flattening layer was 1.0 μm.
The color filter 10 of this embodiment satisfied all the equations (1) to (5) in the x direction.

[Comparative Example 1]
Comparative Example 1 was configured in the same manner as in Example 1 except that the thickness t1 of the sub-pixel was 1.2 μm and the x width × y width of the lens was 2.4 μm × 2.4 μm. Therefore, in this comparative example, T = t1 + t2 = 2.4 (μm), w = 2.4 (μm), L = 2.4 (μm), and d = 0 (μm).
This comparative example did not satisfy the equations (2) and (4).

[Comparative Example 2]
Comparative Example 2 was configured in the same manner as in Example 1 except that the thickness t1 of the sub-pixel was 1.2 μm and the thickness t2 of the flattening layer was 1.4 μm. Therefore, in this comparative example, T = t1 + t2 = 2.6 (μm), w = 2.4 (μm), L = 2.4 (μm), and d = 0 (μm).
This comparative example did not satisfy the formula (2).

[evaluation]
The color reproducibility of Examples 1 and 2 and Comparative Examples 1 and 2 was evaluated.
In this evaluation, in the organic EL display devices of Examples 1 and 2 and Comparative Examples 1 and 2, red, green, and blue were lit in single colors, respectively, and the display colors were observed from the front (z direction).
Further, in the organic EL display devices of Examples 1 and 2 and Comparative Examples 1 and 2, three types of monochromatic organic EL display devices (hereinafter, monochromatic machines) in which all the sub-pixels are formed of either red, green, or blue. ) Was manufactured, and the display of each color was observed from the front. In the monochromatic machine, all the light emitted from the light emitting element transmits only the sub-pixels of the same color, so that color mixing does not occur.
Then, the color of the monochromatic display of the organic EL display devices of Examples 1 and 2 and Comparative Examples 1 and 2 and the display of the same color in the monochromatic machine were compared for each color.
When the color of the monochromatic display looked the same as the display color of the monochromatic machine of the same color, it was determined that the color reproducibility was good (described as A in [Table 1]).
When the color of the monochromatic display changed from the display color of the monochromatic machine of the same color, it was determined that the color reproducibility was poor (described as B in [Table 1]).

[Evaluation results]
As shown in [Table 1], in Examples 1 and 2, the color reproducibility was good. In Examples 1 and 2, since the color filter 10 satisfied all the equations (1) to (5), most of the light transmitted through the adjacent sub-pixels was emitted to the outside from the upper surface 2a and toward the front surface. It is thought that this is because the amount of light headed was small.
On the other hand, in Comparative Examples 1 and 2, the color reproducibility was poor. In Comparative Examples 1 and 2, since a part of the equations (1) to (5) was not satisfied, the light transmitted through the adjacent sub-pixels was focused on the lens facing the adjacent sub-pixels on the front surface. It is thought that this is because the amount of light toward the direction has increased.

Although the preferred embodiments of the present invention have been described above together with the embodiments, the present invention is not limited to the embodiments and the embodiments. It is possible to add, omit, replace, and make other changes to the configuration without departing from the spirit of the present invention.
Further, the present invention is not limited by the above description, but is limited only by the appended claims.

1,1B Lens 1a, 1a1, 1a1B, 1a2, 1a2B Convex lens surface 2, 2A Flattening layer 2a Top surface 3, 13 Filter part 4 Flattening film 5, 15, 15A, 15B Light emitting element 6 Substrate 9, 19 Main body part 10, 11 Color filters 31, 41 First coloring layer (sub-pixel)
32, 42 Second colored layer (sub-pixel)
33 Third colored layer (secondary pixel)
100, 101 Organic EL display device (display device)
P, P10 Unit pixel P1, P11 1st sub-pixel area P2, P12 2nd sub-pixel area P3, P13 3rd sub-pixel area

Claims (5)

A first sub-pixel included in a plurality of sub-pixels constituting a unit pixel in color display and having a first transmission wavelength range,
A first lens arranged so as to face the first sub-pixel in the thickness direction of the first sub-pixel.
The unit pixel or another unit pixel adjacent to the unit pixel is included in a plurality of constituent sub-pixels, and has the same thickness as the first sub-pixel and a second transmission wavelength range different from the first transmission wavelength range. And a second sub-pixel adjacent to the first sub-pixel,
It is arranged so as to face the second sub-pixel in the thickness direction of the second sub-pixel, and is arranged adjacent to the first lens in the same direction as the adjoining direction of the second sub-pixel to the first sub-pixel. With the second lens
A flattening layer arranged between the first sub-pixel and the second sub-pixel, and the first lens and the second lens.
Equipped with
Satisfy the following formulas (1) to (5),
Color filter.

Here, t1 is the thickness of the first sub-pixel and the second sub-pixel, t2 is the thickness of the flattening layer, and w is the width of the first sub-pixel and the second sub-pixel in the adjacent direction. L is the width of the first lens and the second lens in the adjacent direction, and d is the distance between the first lens and the second lens in the adjacent direction. The unit pixel and the other unit pixels have different transmission wavelength ranges of red, green, and blue, respectively, and include three sub-pixels arranged in the same adjacent direction.
The three sub-pixels have the same length in the direction orthogonal to the adjacent direction, and have the same length.
Of the three sub-pixels, at least one set of sub-pixels adjacent to each other satisfies the above equations (1) to (5).
The color filter according to claim 1. The unit pixel and the other unit pixels are
A first color subpixel having a transmission wavelength range of one of the first colors of red, green, and blue, and
A second color sub-pixel having a transmission wavelength range of a second color different from the first color among the red, the green, and the blue.
A third color sub-pixel having a transmission wavelength range of a third color different from the first color and the second color among the red, the green, and the blue, and elongated in one direction.
Includes
The first color subpixel and the second color subpixel are adjacent to each other in the longitudinal direction of the third color subpixel, and the first color subpixel and the second color subpixel are the third color subpixel. The third color sub-pixels are arranged adjacent to each other in the lateral direction intersecting the longitudinal direction of the color sub-pixels.
The formulas (1) to (5) are satisfied in at least one set of sub-pixels adjacent to each other among the first-color sub-pixel, the second-color sub-pixel, and the third-color sub-pixel.
The color filter according to claim 1. The color filter according to any one of claims 1 to 3 and
A plurality of light emitting elements facing each of the plurality of sub-pixels constituting the unit pixel, and
A display device. The light emitting element is an organic EL element.
The display device according to claim 4.

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